cogl-path: export cogl_framebuffer_push_path_clip
cogl-path: export cogl_framebuffer_push_path_clip

Fixes linker error.

Signed-off-by: Andreas Oberritter <obi@saftware.de>

Reviewed-by: Neil Roberts <822ec91a7ef82248fd36162ca8ac3283eba70848@linux.intel.com>

gcampax/cogl,djdeath/cogl,gcampax/cogl,gcampax/cogl,djdeath/cogl,gcampax/cogl,djdeath/cogl